Hotkey for selecting transform manipulator type
First what you linked to is for blender version 2.37 not 2.73, so the shortcuts are wrong.

To add a shortcut to switch the manipulator type; open up the user preferences.
Under the Input tab add a new shortcut under 3D View > 3D View (Global). Type view3d.enable_manipulator in to the identifier field, then just check one of the grayed out boxes for Translate, Scale, and Rotate. The only hard part will be finding 3 unused shortcuts to use for the new transform manipulator shortcuts.


Other transform manipulator shortcuts:
Ctrlspace is the default shortcut to toggle on and of the transform manipulator.
Altspace open a menu to change the orientation type.
When using the buttons in the 3D view header, holding Shift allows for more then one  manipulator type to be active at a time.